Permutation-lock



(No Model.)

J. B. MILLER.

PERMUTATION LOCK. No. 447,575. Patented Mar. 3, 1891.

UNITED STATES PATENT FFICE.

JAMES B. MILLER, OF KENT, OHIO.

PERM UTATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 447,575, dated March 3, 1891.

Application filed May 29, 1890- $erial No. 353,571. (No model.)

To all whom it may concern.-

Be it known that 1, JAMES B. MILLER, of Kent, in the county of Portage and State of Ohio, have invented certain new and useful Improvements in Permutation Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in permutationlocks of the class known as the Douds lock, described in United States Letters Patent No. 396,273, of January 15, 1889, and to which reference is made.

My invention comprises a cut-out device operated from the inside of the door, whereby the permutation mechanism may be rendered inoperative.

In the accompanying drawings, Figures 1 and 2 are plans, with the cover of the lockcasing removed, showing different working positions. Fig. 3 is an edge View of the lock. Fig. 4 is a view in perspective in detail.

My improved lock is designed more especially for inside doors and is shown in the form of a mortise-lock, although it may be constructed in the form of a rim-lock, if so preferred.

A represents the casing of the lock, B the bolt, and O the knob-spindle provided with hand-knobs 0'. On the knob-spindle inside the lock is mounted the so-called cam-hub c, that serves as a cam in withdrawing the bolt. This portion of the mechanism may be of ordinary construction.

D is the cam-disk, provided with spindle cl and thumb-nut d for actuating the cam-disk, knob (1 being located usually on the outside of the door.

E is a vibrating lever having a movable fulcrum, this lever being fulcrumed at e to the rock-arm F. Lever E is provided with a pin 6 for engaging cams D of the cam-disk D, by which engagement lever E is vibrated in rotating the cam-disk in either direction. Lever E is also provided with alug or projecting member 6 that, when the parts are in the position shown in Fig. 1, is adapted to engage shoulder 12 of the bolt, by which engagement the bolt is locked so that it cannot be withdrawn. A person knowing the combination of the lock can by manipulating thumb-nut d rotate the cam-disk first in the one direction and then in the other direction until eventually the vibrating lever is moved to the one side, out of the way of the bolt, so that the latter can be withdrawn by operating the hand-knobs. Arm F has an axial spindle F, provided with a thumb-knob F for shifting arm F, this thumb-knob being located on the opposite side of the door from thumb-knob d. Arm F or the hub thereof has flat surfaces at f and f, adapted, respectively, to engage spring g, whereby the rock-arm is held in the one position or the other,'as shown in Figs. 1 and 2. In Fig. 1 lever E is shown in position locking the bolt, and hence a person from the outside can only open the door by operating the cam-disk. In the position shown in Fig. 2 leverE is backed away from the bolt, thereby cutting out the permutation mechanism, so that the bolt may be withdrawn by operating the hand-knobs O.

This lock is well adapted, for instance, for bed-room doors, and a person on retiring can throw on the combination and in the morning can throw ofi the combination, so that during the day any one can open the door.

H is a sliding plate having lugs or toes h interposed between the cams of hub c and the lugs Z) of the bolt, so that plate H.is Withdrawn or backed in withdrawing the boltplate II when it is thus moved rearward, acting in opposition to a comparatively strong spring h. The bolt has also a light spring I) for shooting the bolt. In closing the doorthe bolt as it is faced back by its engagement with the teats only compresses spring 19 Hence it is not necessary to slam the door or to use much force in closing the door. withdrawing the bolt, by turning the handknobs springs 19 and h are both compressed, whereby a strong action on the knob-spindle is secured, and the knob-spindle is reversed without causing any labor of the bolt-spring, resulting from the presence of plate H, the pressure of which, caused by spring h, is directly applied to the cam-hub c and the knobspindle 0. Hence, as aforesaid, the latter may be light.

That I claim is- 1. In a permutation-lock of the class indicated, in combination, a bolt, a vibrating leveradapted to lock the bolt, and a cam-bearin g disk for actuating the vibrating lever, such vibrating lever having a movable fulcrum, whereby the lever may be advanced to or withdrawn from its engagement from the opposing member of the bolt, substantially as set forth.

2. In a permutation lock of the class indicated, the combination, with a bolt, a vibrating lever and a cam-disk, substantially as indicated, of cut-out mechanism comprising a rock-arm to which the vibrating lever is pivoted, and means for shifting the rock-arm to move the vibrating lever toward or from the bolt, substantially as set forth.

3. The combination, with a bolt, a bolttion, in the presence of two witnesses, this 25 7th day of March, 1890.

JAMES B. MILLEP. 'Witnesses:

0. H. Donna, WARD HOOVER. 

